well ultimately it is up to your tonal preferences
if you play a 5 and are sold on eden then the xlt would probably be the best option
if you get a 4 ohm cabinet and only want to use 1 cabinet then the xlt wins again as it can handle 350 watts vs the t's 250
however imho i would stick to 8 ohm cabs as you can always add a second one
just remember that with the current epifani/bergantino rage eden 210 cabs are becoming more available on the used market
it is also not that unusual to see eden 400 amps up for sale used for around 600

I've never owned an xlt but I did own a 210t for awhile. Matched with another cab, particularly a 1x15, it was great. As a stand alone cab it wimped out before any volume could really be pumped into it. The xlt might be a better choice if you're going to run a single.